As the graphics has referenced that you get more than 30 fps on 1280*800 the goal with this mode is to play the game at lowest settings, and it should be at least playable.
Grand Theft Auto V will become playable at smooth rates (more than 30 Frames-per-second) on any normal computer with low details. If your PC doesn't let you play GTA 5, this is your moment to try out this free method. Your dream to ride Los Santos streets in GTA V, can be complete. Both files can be downloaded from the links given in the very bottom of this article. To apply this method, you need to download two files first is Settings.xml file and second is commandline. It might change graphics a bit awful in case you're trying to run GTA 5 on a very low-end computer with 64 MB Graphic Memory. Specially for core 2 duo 2ghz, 3gb RAM and VRAM lower than 512 MB. My custom settings file improves fps inside the computer itself, and you should get a sweet improved experience on every PC's, and Laptops. This method is best for running GTA 5 at good settings to the lowest possible settings. This method accomplishes for me over 40fps on low-end PC's and Laptops. With this custom settings files you can play GTA 5 without graphic card, and without lags on pretty much every PC.